idolmaster, idolmaster million live!, handa roko, mercy rabbit, 1girl, bikini, blush, bracelet, breasts, cleavage, doll, green eyes, grey hair, hairband, hair ornament, hairpin, heart, heart hair ornament, jewelry, long hair, looking at viewer, mercy usagi, multicolored polka dots, multicolored stripes, navel, o-ring bikini, o-ring bottom, o-ring top, polka dot, ribbon, solo, striped, swimsuit, tied hair, twintails, vertical-striped bikini, vertical stripes, very long hair, wavy hair